eZURLAliasMLTest::testConvertToAlias_NonUnicode() fails in certain situations, and in others it doesn't.

Remove var/.../cache/trans, run test, it will fail.

Now only remove var/.../cache/trans/g-urlalias-....php, the test will pass.

I inspected the var/.../cache/trans/g-urlalias-....php file in both situations, and they differ.